结合洄游模式的中西太平洋鲣资源评估  

Incorporating the migration patterns in stock assessment of Western and Central Pacific Ocean skipjack tuna(Katsuwonus pelamis)

作　　者：黄雨辰 耿喆[1,2,3] 冯佶 石一茜 朱江峰 HUANG Yuchen;GENG Zhe;FENG Ji;SHI Yixi;ZHU Jiangfeng(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai 201306,China;Key Laboratory of Oceanic Fisheries Exploration,Ministry of Agriculture and Rural Affairs,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]大洋渔业资源可持续开发教育部重点实验室,上海201306 [3]农业农村部大洋渔业开发重点实验室,上海201306

出　　处：《大连海洋大学学报》2023年第4期652-662,共11页Journal of Dalian Ocean University

基　　金：国家重点研发计划“蓝色粮仓科技创新”项目(2020YFD0901202);农业农村部全球渔业资源调查监测评估项目(D8021)。

摘　　要：为评估中西太平洋鲣(Katsuwonus pelamis)资源状况,探究洄游模式对鲣资源评估的影响,将中西太平洋鲣渔业划分为8个管理区域和31个船队,重点结合鲣分季节的种群洄游特点,采用年龄结构Stock Synthesis 3(SS3)模型,设置4种不同情景对其资源进行评估,并对鲣不同年龄阶段的洄游模式进行模拟分析。结果表明:鲣资源处于健康状况,未发生资源型过度捕捞(B cur/B 40%=1.9>1)和捕捞型过度捕捞(F cur/F 40%=0.712<1);SS3模型敏感性分析显示,陡度参数(h)对评估结果影响较大,h值越大,评估结果越乐观;不同年龄段的鲣在不同季节呈现不同的洄游模式,考虑季节性洄游对资源评估的影响显著,若评估模型忽略洄游过程,将低估捕捞对资源的影响。研究表明,在资源评估中考虑分季节、年龄的洄游情况更能反映鲣种群动态。The fishery of Western and Central Pacific Ocean skipjack tuna(Katsuwonus pelamis)(refer to WCPO SKJ)is divided into 8 management areas and 31 fleets in order to assess the status of the WCPO SKJ,and to explore the impact of migration patterns on skipjack tuna stock assessment.This paper focuses on the migration patterns of skipjack tuna population by season and uses age structure model Stock Synthesis 3(SS3),setting four different scenarios to simulate and analyze the migration patterns of skipjack tuna at different age stages.The stock assessment result shows that the WCPO SKJ is neither overfished(B cur/B 40%=1.9>1),nor undergoing overfishing(F cur/F 40%=0.712<1).Sensitivity analysis shows that the steepness parameter(h)strongly influences the assessment results.The higher the h value is,the more optimistic the assessment results become.Considering seasonal migration can significantly impact the stock assessment results,if the model ignores migration patterns,the impact of fishing on the stock will be underestimated.The findings indicate that consideration of seasonal and age migration in the stock assessment is a better reflection of skipjack tuna population dynamics.

关 键 词：鲣 渔业资源评估 年龄结构模型 洄游模式 中西太平洋 

分 类 号：S932.4[农业科学—渔业资源]